XML::Simple giving a non-specific error

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#!/usr/bin/perl -w

...
<STILL_MORE>Still more info</STILL_MORE>
<AND_SO_ON>And so on ...</AND_SO_ON>
</ROOT>

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    <ERROR>The error: no closing "/ERROR" tag<ERROR>

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Error while parsing XML:

mismatched tag at line 12, column 2, byte 377 at /usr/lib/perl5/site_p
+erl/5.8.8/
i386-linux-thread-multi/XML/Parser.pm line 187

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Error while parsing XML:

The tag <ERROR> (line 8) was never closed.

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